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Unformatted text preview: Designation: A 178/A 178M – 95 (Reapproved 2000) An American National Standard Standard Specification for Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes 1 This standard is issued under the fixed designation A 178/A 178M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon ( e ) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. 1. Scope 1.1 This specification 2 covers minimum-wall-thickness, electric-resistance-welded tubes made of carbon steel and carbon-manganese steel intended for use as boiler tubes, boiler flues, superheater flues, and safe ends. N OTE 1—Type C and D tubes are not suitable for safe-ending for forge welding. 1.2 The tubing sizes and thicknesses usually furnished to this specification are 1 / 2 to 5 in. [12.7 to 127 mm] in outside diameter and 0.035 to 0.360 in. [0.9 to 9.1 mm], inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification. 1.3 Mechanical property requirements do not apply to tubing smaller than 1 / 8 in. [3.2 mm] in inside diameter or 0.015 in. [0.4 mm] in thickness. 1.4 When these products are to be used in applications conforming to ISO Recommendations for Boiler Construction, the requirements of Specification A 520 shall supplement and supersede the requirements of this specification. 1.5 Optional supplementary requirements are provided and when desired, shall be so stated in the order. 1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specifi- cation. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order. 2. Referenced Documents 2.1 ASTM Standards: A 226/A 226M Specification for Electric-Resistance- Welded Carbon Steel Boiler and Superheater Tubes for High-Pressure Service 3 A 450/A 450M Specification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes 3 A 520 Specification for Supplementary Requirements for Seamless and Electric-Resistance-Welded Carbon Steel Tubular Products for High-Temperature Service Conform- ing to ISO Recommendations for Boiler Construction 3 E 213 Practice for Ultrasonic Examination of Metal Pipe and Tubing 4 E 273 Practice for Ultrasonic Examination of Longitudinal Welded Pipe and Tubing 4 3. Ordering Information 3.1 Orders for material under this specification should3....
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This note was uploaded on 02/01/2012 for the course CIVL 2770 taught by Professor Fariborz during the Winter '11 term at Manitoba.
- Winter '11